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diff --git a/clang-r353983/include/clang/Basic/OperatorPrecedence.h b/clang-r353983/include/clang/Basic/OperatorPrecedence.h
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+//===--- OperatorPrecedence.h - Operator precedence levels ------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// Defines and computes precedence levels for binary/ternary operators.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_OPERATORPRECEDENCE_H
+#define LLVM_CLANG_BASIC_OPERATORPRECEDENCE_H
+
+#include "clang/Basic/TokenKinds.h"
+
+namespace clang {
+
+/// PrecedenceLevels - These are precedences for the binary/ternary
+/// operators in the C99 grammar.  These have been named to relate
+/// with the C99 grammar productions.  Low precedences numbers bind
+/// more weakly than high numbers.
+namespace prec {
+  enum Level {
+    Unknown         = 0,    // Not binary operator.
+    Comma           = 1,    // ,
+    Assignment      = 2,    // =, *=, /=, %=, +=, -=, <<=, >>=, &=, ^=, |=
+    Conditional     = 3,    // ?
+    LogicalOr       = 4,    // ||
+    LogicalAnd      = 5,    // &&
+    InclusiveOr     = 6,    // |
+    ExclusiveOr     = 7,    // ^
+    And             = 8,    // &
+    Equality        = 9,    // ==, !=
+    Relational      = 10,   //  >=, <=, >, <
+    Spaceship       = 11,   // <=>
+    Shift           = 12,   // <<, >>
+    Additive        = 13,   // -, +
+    Multiplicative  = 14,   // *, /, %
+    PointerToMember = 15    // .*, ->*
+  };
+}
+
+/// Return the precedence of the specified binary operator token.
+prec::Level getBinOpPrecedence(tok::TokenKind Kind, bool GreaterThanIsOperator,
+                               bool CPlusPlus11);
+
+}  // end namespace clang
+
+#endif  // LLVM_CLANG_OPERATOR_PRECEDENCE_H